Vehicle wheel



Nov. 3, 1931. J. v. PUGH' 1,830,44

VEHICLE WHEEL Original Filed Nov. 22 192a Patented Nov. 3, 1931 UNITED'STATES JOHN VERNON PUGH,

PATENroFFICE or COVENTRY, ENGLAND, nssrenon o nnnen-wnirwon'rn,

LIMITED, or COVENTRY, ENGLAND VEHICLE WHEEL Original application filed November 22, 1926, Serial No. 150,093, and in Great Britain November 30, 1925.

" Divided and this application filed December 19, 1927. Serial No. 241,213.

This invention relates to vehicle wheels of the type in which a detachable rim for carrying a tyre is mounted upon the remainder of the wheel structure.

The exacting requirements of modern mo tor vehicle trafiic render the provision of ample braking facilities ofthe greatest importance and not only are large diameter and wide brake drums becoming necessary but the practice of fitting brakes to more than two of the wheels of a vehicle is increasing.

According to the invention a vehicle wheel consists in a brake drum structure supported by tension spokes in a manner capable of resisting the stresses caused by the weight of the vehicleand the torsional-and side forces while a readily detachable tyre-carrying rim or felloe is attached solely to said brake drum structure.

Figure 1 shows in transverse section a friction surface member or brake ring supported by the spokes from the hub and adapted to carrythe tyre-supporting member or rim which is slid sideways thereon from the outer side and retained by bolts or the like;

Figure 2 is a fragmental side view showing a leaf-headed bolt for securing the tyre mm;

Figure 3 is a similar view to Figure l but with the tyre rim detachable on the other side;

Figure 4 shows a built-up section in which the friction surface member or ring also contributes to supporting the contact surfaces or rim for the tyre.

In carrying the invention into effect in one convenient form a brake drum ring 72, or 7' is formed from channel section material having a flat base and sides standing at right angles thereto.

The interior cylindrical surface of the base 72 or j forms the friction surface of the brake drum and the ring is connected to a hub or any equivalent member by means of two sets ofspokes h or j penetrating the base of the ring closely adjacent to the edge which is remote from the vehicle and joining the hub or its equivalent closely adjacent to'the ends thereof. v V

The set of spokes adjacent to the vehicle is :headsh of thebolts are made complemendisposed to correspond with the surface of a very blunt orflat cone with the apex directed towards the vehicle and thespokes in this set will be highly stressed and capable of Y supporting the weight of the vehicle and also oftransmitting all the forces due to driving and braking. The roots of these spokes are positioned,closelyadjacent to the inner end of the hub, v

The other set of spokes which is farther away from the vehicle is disposed adjacent a cone surface of a smaller contained angle and with its apex directed away from the vehicle.

These spokes are less highly stressed and are arranged mainly'to withstand side stresses (i5 to which the tyre or. rim of the wheel may be subjected. These spokes are suitably connected to the outer end of the hub. Figures '1 and 2 illustrate the case of a U-section tyre rim of the kind which may be split and contracted to change the tyre and in this construction a brake ring if is employed which is of sufficient strength to form the support or seating for thetyre rim h and i the attachment means for the spokes 71. The brake ring [2, is made of a slightly greater I width than the narrower bottom portion from the flange 71. to the flange h of the tyre rim and is cylindricalthroughout itswidth.

It may if desired be set out as at k upon the side remote from thevehicle to form the seating ring for the nipple heads of the spokes h A narrow out-turned flange k is provided at this end of the rim the outer edge of which registers with the internal diameter of the tyre rim h which is slid thereon and seats immediatelyadjacent its outer flange k The inner edge of the brake ring is provided with a wider out-turned fiangeh which proj ects'over the inner flange k of the tyre rim I it andis roundedin acu'rve complementary thereto. v

.The'tyre rim section It and the brake ring 7L7 are retained inconnection with one another by a series of dogs or leaf-headed bolts h .which arepassed throughnotches it in the narrowiflange k of the brake ring and holes h in the wider flangeh thereof. The leaf An alternative to the foregoing construe-m.

tionflis shown in Figure 3 and in this case the I claim as new and desire to secure by Letters Patent is V 1. In combination in a vehicle wheel, a hub, a thick section worked steel separate ring disposedaconcentrically nearerone end of said h-u'b than the other, a wide more aor less cylindricalregion on said ring, sets of tensioned wire spokesextendingfrom axially separated wider flange 7' of the'brak'e ring .is positi'onedf z'ones'on saidfhfub to near-one edge of s'aid adjacent to the spoking j onthesi'de wlfich is remote from the vehicle and the narrowerflange j is provided upon the other side. The leaf-headed bolts-j are theisamesaszbe-p fore but are put through from the opposite side so that the leaf heads j are upon the side adjacent to the vehicle and the nuts? upon the sideremote-therefrom.

Iii-these cases where the bolts and dogs-are combined and the whole structure lightened andsimp'lified bythe leaf heads the tyre changing can only be done with the wheel 'ofi theoar butdegsmay be usedxin p'lace'of the leaf headsfi andthe 'bolts be-' disp osed with the nuts accessible from the outefi'side of the wheel for tyre changing without taking the'wheel-off; The trough shaped part h or j to which the spokes-are -fi xed acts as the brakeban d;

' There is a fian'geonboth sides of the rim an'd'it is cut away to permitithe circular part of the-bolt passing through and topermitthe flattened part of the dog or endof'the bolt to be seated thereon: r r e "A brakering dinay as-shown-in'Fig-ure4,

F :be provided "with a chamfered or. coned 'seata ing upon 1 both its edges and-separate flanges 'o 'and 0 be-'- providedto fit' thereon,

Ill) about .04- ofian inclrin-thicknessi such flanges being provided ifdesired with outwardly turned ribs-0 around their I inner edges to increase the width-of the seating ring 'to "leave-the greater part of the wide regionavailable as a-brake drum surface, and a demountable thinner section worked steel structure for .rrnoutn-ing a. pneumatic tyre wholly supported on saidiring.

2. In combination in a vehicle wheel, a hub, thiekl section; :workedi steel separate ring disposed 'concentrically nearerione end of said h'ub'th an". th eiotherya wide brake drum. surfa Ce region on said ring, sets:of;tensioned..wire spokes extending; from axially; separated zones .on said hub a: region. near: an .-edge oififsaid iringgwhich "is remote from s and: of

,largerzdiameterz than said brakedrum surface; outwardly-turnediflangesw at each edge of! said; ring, l and;- athinner worked steel troughishape d section: demountablei ring en-v gaging-i said:- flanges for mounting; an pneutestimony; whereofi I. have signed my nani'eto thisspeoificationv v VJOHN VERNON-PLUGH.-

upon the brakering; ".Ai tyresiipporting rim 0 is provided as in the previous construction and the whole maybe attached together 'by separateboltsupon each side-or by b'olt's 0 going right through the rim aS- may most convenient. In this casethe 'spokes o" pass 'through-theplain brake ring oladjacentito the side 0 which is fartherest from the ve- I I In the last described construction'different 'metals; such as duralumin,- may beusedfiftir performed and where the material ac-ts=as=a tionedto the particular duty'whichis to be brake drumit ispossible -th'at itsthickness should not 'be less th'an about of-an'inoh. I A rim=which serves inerelyas a tyre seat and i has neither'brake drunr nor" spoke' seating functions to performmight j be reduced 5 t Having now describedmy 'inventiorr; what 1 

